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1. openpay-platform openpay-platform Public

   Payment orchestrator + double-entry ledger: idempotent API, state machine, transactional outbox, failure-injection tests (Java, Spring Boot, Kafka, PostgreSQL)

   Java

2. ddia-study-lab ddia-study-lab Public

   DDIA (Designing Data-Intensive Applications, 2nd ed.) study guide in Persian & English — 14 chapters, 100+ interactive diagrams, exercises, AI-platform capstone | راهنمای مطالعهٔ DDIA فارسی

   HTML 2

3. portfolio-service portfolio-service Public

   Portfolio Position Service (Spring Boot + Redis + Kafka + Grafana + Sentry)

   Java

4. jpos/jPOS jpos/jPOS Public

   jPOS Project

   Java 730 505